1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 // ***************************************************************************** 39 // 40 // Minimal setup for HSP Audio Gateway (!! UNDER DEVELOPMENT !!) 41 // 42 // ***************************************************************************** 43 44 #include "btstack_config.h" 45 46 #include <stdint.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include "btstack_debug.h" 52 #include "btstack_event.h" 53 #include "btstack_memory.h" 54 #include "btstack_run_loop.h" 55 #include "classic/sdp_server.h" 56 #include "classic/sdp_query_rfcomm.h" 57 #include "hci.h" 58 #include "hci_cmd.h" 59 #include "hci_dump.h" 60 #include "hsp_ag.h" 61 #include "l2cap.h" 62 63 #define RFCOMM_SERVER_CHANNEL 1 64 65 #define HSP_HS_BUTTON_PRESS "AT+CKPD=200" 66 #define HSP_HS_AT_CKPD "AT+CKPD\r\n" 67 #define HSP_AG_OK "\r\nOK\r\n" 68 #define HSP_AG_ERROR "\r\nERROR\r\n" 69 #define HSP_AG_RING "\r\nRING\r\n" 70 #define HSP_MICROPHONE_GAIN "+VGM" 71 #define HSP_SPEAKER_GAIN "+VGS" 72 73 #define HSP_HS_MICROPHONE_GAIN "AT+VGM=" 74 #define HSP_HS_SPEAKER_GAIN "AT+VGS=" 75 76 static const char default_hsp_ag_service_name[] = "Audio Gateway"; 77 78 static bd_addr_t remote; 79 static uint8_t channel_nr = 0; 80 81 static uint16_t mtu; 82 static uint16_t rfcomm_cid = 0; 83 static uint16_t sco_handle = 0; 84 static uint16_t rfcomm_handle = 0; 85 static btstack_timer_source_t hs_timeout; 86 87 // static uint8_t connection_state = 0; 88 89 static int ag_microphone_gain = -1; 90 static int ag_speaker_gain = -1; 91 static uint8_t ag_ring = 0; 92 static uint8_t ag_send_ok = 0; 93 static uint8_t ag_send_error = 0; 94 static uint8_t ag_num_button_press_received = 0; 95 static uint8_t ag_support_custom_commands = 0; 96 97 static btstack_packet_callback_registration_t hci_event_callback_registration; 98 99 typedef enum { 100 HSP_IDLE, 101 HSP_SDP_QUERY_RFCOMM_CHANNEL, 102 HSP_W4_SDP_EVENT_QUERY_COMPLETE, 103 HSP_W4_RFCOMM_CONNECTED, 104 HSP_W4_RING_ANSWER, 105 HSP_W4_USER_ACTION, 106 HSP_W2_CONNECT_SCO, 107 HSP_W4_SCO_CONNECTED, 108 HSP_ACTIVE, 109 HSP_W2_DISCONNECT_SCO, 110 HSP_W4_SCO_DISCONNECTED, 111 HSP_W2_DISCONNECT_RFCOMM, 112 HSP_W4_RFCOMM_DISCONNECTED, 113 HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN 114 } hsp_state_t; 115 116 static hsp_state_t hsp_state = HSP_IDLE; 117 118 119 static hsp_ag_callback_t hsp_ag_callback; 120 121 static void hsp_run(); 122 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 123 static void handle_query_rfcomm_event(uint8_t packet_type, uint8_t *packet, uint16_t size); 124 125 static void dummy_notify(uint8_t * event, uint16_t size){} 126 127 void hsp_ag_register_packet_handler(hsp_ag_callback_t callback){ 128 if (callback == NULL){ 129 callback = &dummy_notify; 130 } 131 hsp_ag_callback = callback; 132 } 133 134 static void emit_event(uint8_t event_subtype, uint8_t value){ 135 if (!hsp_ag_callback) return; 136 uint8_t event[4]; 137 event[0] = HCI_EVENT_HSP_META; 138 event[1] = sizeof(event) - 2; 139 event[2] = event_subtype; 140 event[3] = value; // status 0 == OK 141 (*hsp_ag_callback)(event, sizeof(event)); 142 } 143 144 static void emit_event_audio_connected(uint8_t status, uint16_t handle){ 145 if (!hsp_ag_callback) return; 146 uint8_t event[6]; 147 event[0] = HCI_EVENT_HSP_META; 148 event[1] = sizeof(event) - 2; 149 event[2] = HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE; 150 event[3] = status; 151 little_endian_store_16(event, 4, handle); 152 (*hsp_ag_callback)(event, sizeof(event)); 153 } 154 155 void hsp_ag_create_service(uint8_t * service, uint32_t service_record_handle, int rfcomm_channel_nr, const char * name){ 156 uint8_t* attribute; 157 de_create_sequence(service); 158 159 // 0x0000 "Service Record Handle" 160 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceRecordHandle); 161 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 162 163 // 0x0001 "Service Class ID List" 164 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ServiceClassIDList); 165 attribute = de_push_sequence(service); 166 { 167 // "UUID for PAN Service" 168 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_Headset_AG); 169 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_GenericAudio); 170 } 171 de_pop_sequence(service, attribute); 172 173 // 0x0004 "Protocol Descriptor List" 174 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_ProtocolDescriptorList); 175 attribute = de_push_sequence(service); 176 { 177 uint8_t* l2cpProtocol = de_push_sequence(attribute); 178 { 179 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, SDP_L2CAPProtocol); 180 } 181 de_pop_sequence(attribute, l2cpProtocol); 182 183 uint8_t* rfcomm = de_push_sequence(attribute); 184 { 185 de_add_number(rfcomm, DE_UUID, DE_SIZE_16, SDP_RFCOMMProtocol); // rfcomm_service 186 de_add_number(rfcomm, DE_UINT, DE_SIZE_8, rfcomm_channel_nr); // rfcomm channel 187 } 188 de_pop_sequence(attribute, rfcomm); 189 } 190 de_pop_sequence(service, attribute); 191 192 // 0x0005 "Public Browse Group" 193 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BrowseGroupList); // public browse group 194 attribute = de_push_sequence(service); 195 { 196 de_add_number(attribute, DE_UUID, DE_SIZE_16, SDP_PublicBrowseGroup); 197 } 198 de_pop_sequence(service, attribute); 199 200 // 0x0009 "Bluetooth Profile Descriptor List" 201 de_add_number(service, DE_UINT, DE_SIZE_16, SDP_BluetoothProfileDescriptorList); 202 attribute = de_push_sequence(service); 203 { 204 uint8_t *sppProfile = de_push_sequence(attribute); 205 { 206 de_add_number(sppProfile, DE_UUID, DE_SIZE_16, SDP_HSP); 207 de_add_number(sppProfile, DE_UINT, DE_SIZE_16, 0x0102); // Verision 1.2 208 } 209 de_pop_sequence(attribute, sppProfile); 210 } 211 de_pop_sequence(service, attribute); 212 213 // 0x0100 "Service Name" 214 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 215 if (name){ 216 de_add_data(service, DE_STRING, strlen(name), (uint8_t *) name); 217 } else { 218 de_add_data(service, DE_STRING, strlen(default_hsp_ag_service_name), (uint8_t *) default_hsp_ag_service_name); 219 } 220 } 221 222 static int hsp_ag_send_str_over_rfcomm(uint16_t cid, char * command){ 223 if (!rfcomm_can_send_packet_now(cid)) return 1; 224 int err = rfcomm_send(cid, (uint8_t*) command, strlen(command)); 225 if (err){ 226 printf("rfcomm_send -> error 0X%02x", err); 227 return err; 228 } 229 printf("Send string: \"%s\"\n", command); 230 return err; 231 } 232 233 void hsp_ag_support_custom_commands(int enable){ 234 ag_support_custom_commands = enable; 235 } 236 237 int hsp_ag_send_result(char * result){ 238 if (!ag_support_custom_commands) return 1; 239 return hsp_ag_send_str_over_rfcomm(rfcomm_cid, result); 240 } 241 242 static void hsp_ag_reset_state(void){ 243 hsp_state = HSP_IDLE; 244 245 rfcomm_cid = 0; 246 rfcomm_handle = 0; 247 sco_handle = 0; 248 249 ag_send_ok = 0; 250 ag_send_error = 0; 251 ag_ring = 0; 252 253 ag_num_button_press_received = 0; 254 ag_support_custom_commands = 0; 255 256 ag_microphone_gain = -1; 257 ag_speaker_gain = -1; 258 } 259 260 void hsp_ag_init(uint8_t rfcomm_channel_nr){ 261 // register for HCI events 262 hci_event_callback_registration.callback = &packet_handler; 263 hci_add_event_handler(&hci_event_callback_registration); 264 265 // init L2CAP 266 l2cap_init(); 267 268 rfcomm_init(); 269 rfcomm_register_service(packet_handler, rfcomm_channel_nr, 0xffff); // reserved channel, mtu limited by l2cap 270 271 sdp_query_rfcomm_register_callback(handle_query_rfcomm_event); 272 273 hsp_ag_reset_state(); 274 } 275 276 void hsp_ag_connect(bd_addr_t bd_addr){ 277 if (hsp_state != HSP_IDLE) return; 278 hsp_state = HSP_SDP_QUERY_RFCOMM_CHANNEL; 279 memcpy(remote, bd_addr, 6); 280 hsp_run(); 281 } 282 283 void hsp_ag_disconnect(void){ 284 switch (hsp_state){ 285 case HSP_ACTIVE: 286 hsp_state = HSP_W2_DISCONNECT_SCO; 287 break; 288 case HSP_W2_CONNECT_SCO: 289 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 290 break; 291 292 case HSP_W4_RFCOMM_CONNECTED: 293 case HSP_W4_SCO_CONNECTED: 294 hsp_state = HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN; 295 break; 296 default: 297 return; 298 } 299 hsp_run(); 300 } 301 302 void hsp_ag_set_microphone_gain(uint8_t gain){ 303 if (gain < 0 || gain >15) { 304 printf("Gain must be in interval [0..15], it is given %d\n", gain); 305 return; 306 } 307 ag_microphone_gain = gain; 308 hsp_run(); 309 } 310 311 // AG +VGS=5 [0..15] ; HS AT+VGM=6 | AG OK 312 void hsp_ag_set_speaker_gain(uint8_t gain){ 313 if (gain < 0 || gain >15) { 314 printf("Gain must be in interval [0..15], it is given %d\n", gain); 315 return; 316 } 317 ag_speaker_gain = gain; 318 hsp_run(); 319 } 320 321 static void hsp_timeout_handler(btstack_timer_source_t * timer){ 322 ag_ring = 1; 323 } 324 325 static void hsp_timeout_start(void){ 326 btstack_run_loop_remove_timer(&hs_timeout); 327 btstack_run_loop_set_timer_handler(&hs_timeout, hsp_timeout_handler); 328 btstack_run_loop_set_timer(&hs_timeout, 2000); // 2 seconds timeout 329 btstack_run_loop_add_timer(&hs_timeout); 330 } 331 332 static void hsp_timeout_stop(void){ 333 btstack_run_loop_remove_timer(&hs_timeout); 334 } 335 336 void hsp_ag_start_ringing(void){ 337 if (hsp_state != HSP_W2_CONNECT_SCO) return; 338 ag_ring = 1; 339 hsp_state = HSP_W4_RING_ANSWER; 340 hsp_timeout_start(); 341 } 342 343 void hsp_ag_stop_ringing(void){ 344 ag_ring = 0; 345 ag_num_button_press_received = 0; 346 hsp_state = HSP_W2_CONNECT_SCO; 347 hsp_timeout_stop(); 348 } 349 350 static void hsp_run(void){ 351 int err; 352 353 if (ag_send_ok){ 354 ag_send_ok = 0; 355 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 356 if (err){ 357 ag_send_ok = 1; 358 } 359 return; 360 } 361 362 if (ag_send_error){ 363 ag_send_error = 0; 364 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_ERROR); 365 if (err) { 366 ag_send_error = 1; 367 } 368 return; 369 } 370 371 switch (hsp_state){ 372 case HSP_SDP_QUERY_RFCOMM_CHANNEL: 373 hsp_state = HSP_W4_SDP_EVENT_QUERY_COMPLETE; 374 printf("Start SDP query %s, 0x%02x\n", bd_addr_to_str(remote), SDP_HSP); 375 sdp_query_rfcomm_channel_and_name_for_uuid(remote, SDP_HSP); 376 break; 377 378 case HSP_W4_RING_ANSWER: 379 if (ag_ring){ 380 ag_ring = 0; 381 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_RING); 382 if (err) { 383 ag_ring = 1; 384 } 385 break; 386 } 387 388 if (!ag_num_button_press_received) break; 389 ag_send_ok = 0; 390 391 ag_num_button_press_received = 0; 392 hsp_state = HSP_W2_CONNECT_SCO; 393 394 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, HSP_AG_OK); 395 if (err) { 396 hsp_state = HSP_W4_RING_ANSWER; 397 ag_num_button_press_received = 1; 398 } 399 break; 400 case HSP_W2_CONNECT_SCO: 401 if (!hci_can_send_command_packet_now()) break; 402 hsp_state = HSP_W4_SCO_CONNECTED; 403 hci_send_cmd(&hci_setup_synchronous_connection, rfcomm_handle, 8000, 8000, 0xFFFF, hci_get_sco_voice_setting(), 0xFF, 0x003F); 404 break; 405 406 case HSP_W2_DISCONNECT_SCO: 407 ag_num_button_press_received = 0; 408 409 hsp_state = HSP_W4_SCO_DISCONNECTED; 410 gap_disconnect(sco_handle); 411 break; 412 413 case HSP_W2_DISCONNECT_RFCOMM: 414 hsp_state = HSP_W4_RFCOMM_DISCONNECTED; 415 rfcomm_disconnect(rfcomm_cid); 416 break; 417 case HSP_ACTIVE: 418 419 if (ag_microphone_gain >= 0){ 420 int gain = ag_microphone_gain; 421 ag_microphone_gain = -1; 422 char buffer[10]; 423 sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain); 424 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 425 if (err) { 426 ag_microphone_gain = gain; 427 } 428 break; 429 } 430 431 if (ag_speaker_gain >= 0){ 432 int gain = ag_speaker_gain; 433 ag_speaker_gain = -1; 434 char buffer[10]; 435 sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain); 436 err = hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer); 437 if (err) { 438 ag_speaker_gain = gain; 439 } 440 break; 441 } 442 break; 443 default: 444 break; 445 } 446 } 447 448 449 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 450 // printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 451 if (packet_type == RFCOMM_DATA_PACKET){ 452 while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){ 453 size--; 454 packet++; 455 } 456 457 if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){ 458 printf("Received button press %s\n", HSP_HS_BUTTON_PRESS); 459 ag_num_button_press_received++; 460 ag_send_ok = 1; 461 if (hsp_state == HSP_ACTIVE && ag_num_button_press_received >=2){ 462 ag_num_button_press_received = 0; 463 hsp_state = HSP_W2_DISCONNECT_SCO; 464 } 465 } else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){ 466 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]); 467 ag_send_ok = 1; 468 emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain); 469 470 } else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){ 471 uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]); 472 ag_send_ok = 1; 473 emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain); 474 475 } else if (strncmp((char *)packet, "AT+", 3) == 0){ 476 ag_send_error = 1; 477 if (!hsp_ag_callback) return; 478 // re-use incoming buffer to avoid reserving large buffers - ugly but efficient 479 uint8_t * event = packet - 3; 480 event[0] = HCI_EVENT_HSP_META; 481 event[1] = size + 1; 482 event[2] = HSP_SUBEVENT_HS_COMMAND; 483 (*hsp_ag_callback)(event, size+3); 484 } 485 486 hsp_run(); 487 return; 488 } 489 490 if (packet_type != HCI_EVENT_PACKET) return; 491 uint8_t event = packet[0]; 492 bd_addr_t event_addr; 493 uint16_t handle; 494 495 switch (event) { 496 case BTSTACK_EVENT_STATE: 497 // BTstack activated, get started 498 if (packet[2] == HCI_STATE_WORKING){ 499 printf("BTstack activated, get started .\n"); 500 } 501 break; 502 503 case HCI_EVENT_PIN_CODE_REQUEST: 504 // inform about pin code request 505 printf("Pin code request - using '0000'\n\r"); 506 reverse_bd_addr(&packet[2], event_addr); 507 hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000"); 508 break; 509 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{ 510 int index = 2; 511 uint8_t status = packet[index++]; 512 sco_handle = little_endian_read_16(packet, index); 513 index+=2; 514 bd_addr_t address; 515 memcpy(address, &packet[index], 6); 516 index+=6; 517 uint8_t link_type = packet[index++]; 518 uint8_t transmission_interval = packet[index++]; // measured in slots 519 uint8_t retransmission_interval = packet[index++];// measured in slots 520 uint16_t rx_packet_length = little_endian_read_16(packet, index); // measured in bytes 521 index+=2; 522 uint16_t tx_packet_length = little_endian_read_16(packet, index); // measured in bytes 523 index+=2; 524 uint8_t air_mode = packet[index]; 525 526 if (status != 0){ 527 log_error("(e)SCO Connection failed, status %u", status); 528 emit_event_audio_connected(status, sco_handle); 529 break; 530 } 531 switch (link_type){ 532 case 0x00: 533 printf("SCO Connection established. \n"); 534 if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval); 535 if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval); 536 if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length); 537 if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length); 538 break; 539 case 0x02: 540 printf("eSCO Connection established. \n"); 541 break; 542 default: 543 log_error("(e)SCO reserved link_type 0x%2x", link_type); 544 break; 545 } 546 log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, " 547 " rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle, 548 bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode); 549 550 if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){ 551 hsp_state = HSP_W2_DISCONNECT_SCO; 552 break; 553 } 554 555 hsp_state = HSP_ACTIVE; 556 emit_event_audio_connected(status, sco_handle); 557 break; 558 } 559 560 case RFCOMM_EVENT_INCOMING_CONNECTION: 561 // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16) 562 if (hsp_state != HSP_IDLE) return; 563 564 reverse_bd_addr(&packet[2], event_addr); 565 rfcomm_cid = little_endian_read_16(packet, 9); 566 printf("RFCOMM channel %u requested for %s\n", packet[8], bd_addr_to_str(event_addr)); 567 rfcomm_accept_connection(rfcomm_cid); 568 569 hsp_state = HSP_W4_RFCOMM_CONNECTED; 570 571 break; 572 573 case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE: 574 printf("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x\n", packet_type, packet[0]); 575 // data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16) 576 if (packet[2]) { 577 printf("RFCOMM channel open failed, status %u\n", packet[2]); 578 hsp_ag_reset_state(); 579 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, packet[2]); 580 } else { 581 // data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16) 582 rfcomm_handle = little_endian_read_16(packet, 9); 583 rfcomm_cid = little_endian_read_16(packet, 12); 584 mtu = little_endian_read_16(packet, 14); 585 printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d\n", rfcomm_cid, mtu, hsp_state); 586 587 switch (hsp_state){ 588 case HSP_W4_RFCOMM_CONNECTED: 589 ag_num_button_press_received = 0; 590 hsp_state = HSP_W2_CONNECT_SCO; 591 break; 592 case HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN: 593 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 594 break; 595 default: 596 printf("no valid state\n"); 597 break; 598 } 599 } 600 break; 601 602 case HCI_EVENT_DISCONNECTION_COMPLETE: 603 if (hsp_state != HSP_W4_SCO_DISCONNECTED){ 604 log_info("received gap disconnect in wrong hsp state"); 605 } 606 handle = little_endian_read_16(packet,3); 607 if (handle == sco_handle){ 608 printf("SCO disconnected, w2 disconnect RFCOMM\n"); 609 sco_handle = 0; 610 hsp_state = HSP_W2_DISCONNECT_RFCOMM; 611 break; 612 } 613 break; 614 615 case RFCOMM_EVENT_CHANNEL_CLOSED: 616 if (hsp_state != HSP_W4_RFCOMM_DISCONNECTED){ 617 log_info("received RFCOMM disconnect in wrong hsp state"); 618 } 619 printf("RFCOMM channel closed\n"); 620 hsp_ag_reset_state(); 621 emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0); 622 break; 623 default: 624 break; 625 } 626 hsp_run(); 627 } 628 629 static void handle_query_rfcomm_event(uint8_t packet_type, uint8_t *packet, uint16_t size){ 630 switch (packet[0]){ 631 case SDP_EVENT_QUERY_RFCOMM_SERVICE: 632 channel_nr = sdp_event_query_rfcomm_service_get_rfcomm_channel(packet); 633 printf("** Service name: '%s', RFCOMM port %u\n", sdp_event_query_rfcomm_service_get_name(packet), channel_nr); 634 break; 635 case SDP_EVENT_QUERY_COMPLETE: 636 if (channel_nr > 0){ 637 hsp_state = HSP_W4_RFCOMM_CONNECTED; 638 printf("RFCOMM create channel. state %d\n", HSP_W4_RFCOMM_CONNECTED); 639 rfcomm_create_channel(remote, channel_nr, NULL); 640 break; 641 } 642 hsp_ag_reset_state(); 643 printf("Service not found, status %u.\n", sdp_event_query_complete_get_status(packet)); 644 if (sdp_event_query_complete_get_status(packet)){ 645 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, sdp_event_query_complete_get_status(packet)); 646 } else { 647 emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, SDP_SERVICE_NOT_FOUND); 648 } 649 break; 650 default: 651 break; 652 } 653 } 654 655 656